Table 4.

Between-group NDI score pre and post-intervention

	Pre-intervention						Post-intervention
Sections	Intervention group		Control group				Intervention group		Control group
	Mean Rank	Sum of Ranks	Mean Rank	Sum of Ranks	d	P-value*	Mean Rank	Sum of Ranks	Mean Rank	Sum of Ranks	D	P-value*
Pain intensity	12.67	152.00	12.33	148.00	0	1.000	9.13	109.50	15.88	190.50	1.086	0.017
Personal care (washing, dressing, etc.)	13.29	159.50	11.71	140.50	0	1.000	11.33	136.00	13.67	164.00	0.335	0.443
Lifting	12.63	151.50	12.38	148.50	0.570	0.180	9.79	117.50	15.21	182.50	0.829	0.060
Reading	13.04	156.50	11.96	143.50	0.417	0.317	10.25	123.00	14.75	177.00	0.671	0.128
Headaches	11.25	135.00	13.75	165.00	0.756	0.083	8.33	100.00	16.67	200.00	1.459	0.003
Concentration	13.33	160.00	11.67	140.00	0.237	0.564	10.63	127.50	14.38	172.50	0.550	0.198
Work	14.13	169.50	10.88	130.50	0.417	0.317	11.00	132.00	14.00	168.00	0.434	0.319
Driving	13.00	156.00	12.00	144.00	0.417	0.317	9.13	109.50	15.88	190.50	1.086	0.017
Sleeping	11.58	139.00	13.42	161.00	0.603	0.157	10.67	128.00	14.33	172.00	0.537	0.219
Recreation	14.50	174.00	10.50	126.00	0.603	0.157	13.00	156.00	12.00	144.00	0.142	0.755
Total NDI score, MD (95% CI)	27.08 ± 9.78	25.41 ± 10.78	1.66 (-7.04, 10.38)		0.162	0.696	17.41 ± 7.10	25.58 ± 10.38	-8.16 (− 15.70, − 0.63)	− 0.918	0.035	0.035

*P < 0.05, All P-values are obtained from Mann–Whitney U test except for total NDI score obtained from independent samples t-test

Significant P-values are showed in bold

MD, Mean Difference, NDI, Neck Disability Index, d, Effect size (Cohen’s d)